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https://issues.apache.org/jira/browse/NIFI-10948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17715997#comment-17715997
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Chris Sampson commented on NIFI-10948:
--------------------------------------
Note that the QueryElasticsearchHttp processor is deprecated in recent versions
of NiFi 1.x and removed from the upcoming 2.0.0 release.
Suggested alternatives are
[JsonQueryElasticsearch|https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-elasticsearch-restapi-nar/1.21.0/org.apache.nifi.processors.elasticsearch.JsonQueryElasticsearch/index.html]
or
[PaginatedJsonQueryElasticsearch|https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-elasticsearch-restapi-nar/1.21.0/org.apache.nifi.processors.elasticsearch.PaginatedJsonQueryElasticsearch/index.html].
These use the
[ElasticSearchClientService|https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-elasticsearch-client-service-nar/1.21.0/org.apache.nifi.elasticsearch.ElasticSearchClientServiceImpl/index.html]
for creating connections using the Elastic low-level rest api client library
under the hood.
They haven't been properly tested against OpenSearch, but you might find better
compatibility with these more recent versions of the Elasticsearch processors.
> QueryElasticsearchHTTP doesnt work on Opensearch (and possibly newer
> Elasticsearch versions)
> --------------------------------------------------------------------------------------------
>
> Key: NIFI-10948
> URL: https://issues.apache.org/jira/browse/NIFI-10948
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Extensions
> Affects Versions: 1.15.3
> Environment: Nifi 1.15.3 on centos machine
> Reporter: David Vassallo
> Priority: Minor
> Attachments: image-2022-12-05-16-34-20-513.png
>
>
> The QueryElasticsearchHTTP processor will return a "Null Pointer Exception"
> when running agasint Opensearch and probably newer versions of Elasticsearch.
> I tracked down the null pointer to this line:
>
> [https://github.com/apache/nifi/blob/0ebc6d31489e975dcbbe078fa572332ef8ffa9e2/nifi-nar-bundles/nifi-elasticsearch-bundle/nifi-elasticsearch-processors/src/main/java/org/apache/nifi/processors/elasticsearch/QueryElasticsearchHttp.java#L418]
>
> The processor is looking for the "_type" field which is no longer in the
> right place. In opensearch v 1.x and above (possibly Elasticsearch too, but I
> dont have the means to test this), the field has moved to be a child of the
> "@metadata" field:
> !image-2022-12-05-16-34-20-513.png!
>
> If you try to circumvent this issue by populating the "Type" property of the
> processor, you will get an HTTP 400 Bad Message response since the processor
> builds a URL with the "size" and "from" arguments as part of the URL which
> are not supported by Opensearch/Elasticsearch in more recent versions, so you
> are forced to leave this property empty but then run into the null problem
> described above
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